The US5G-M has all the carrier class performance
specifications
of the US5G-A, but both input and output
capacities are
downsized in order to specifically address
the network sync
requirements of Tier 2 and Tier 3 network
operators.

The US5G-M offers users features required for Tier 1 carrier
network synchronization. By
re-configuring the US5G shelf/chassis design in order to
reduce both material and manufacturing process costs were reduced.
And additional cost reductions were achieved with modifications to the COM module
and to the IOP modules. The result is a remarkably versatile
Central Office BITS clock with all the feature/function
benefits of a US5G-A, but at a price point many thousands of
dollars less.

The US5G-M incorporates features that are NOT available on
the US5G-A. The most prominent feature differential is the
integrated GPS module which enables the PRS reference to be
directly routed through the backplane to the IOP modules.
The US5G-M, in fact, provides the user with the option of
installing dual redundant GPS receiver modules onto plug-in
DB-25 connectors on the back panel. The clock can be
configured for either single or dual GPS operation.

The US5G-M also features plug on Wire Wrap connector
fixtures which allow output connections to be made directly
on the back panel eliminating co-located WW output connector
panels and allowing a more efficient use of limited rack
space.
If the new clock installation is replacing a dated legacy
clock such as a DCD 400/500 shelf or a TSG-3800, the fixture can be
omitted and output adaptor cables can be routed directly to
the legacy WW panels enabling an easy transition without the
need to re-install the cabling infrastructure to the network
elements.

The US5G-M Main Shelf provides two slot pairs for frequency
outputs. These paired slots may be equipped with either a
single unprotected output module or a pair of protected
modules. The output frequency output modules are offered in
either 20 Port or 40 Port versions. These modules are
identical to those used on the US5G-A. The Frequency output
modules are offered in either T1/CC frequency outputs or E1
outputs. The T1/CC modules may be software configured to the
port level for either T1 or Composite Clock. The E1 modules
may be software configured for either 2.048 Mbs or 2.048
MHz.

The Main Shelf Chassis also provides a slot pair which is
hard wired to accommodate time server modules. The slots can
accommodate either one single server module or a pair of
server modules operating in a redundant protected mode.
Either NTP time server blades or IEEE-1588 PTP Grand Master
server blades can be selected. The time server blades
provide a 1 Gbps Optical interface on the front panel or a
10/100 Mbps electrical interface on the back panel.

Total Software Management means that any module that is
equipped in the slots is entirely managed by system software
via the LAN interface with the COM module. Unlike some
systems this includes not only routine configuration and
alarm management functions, but also ALL software download
processes needed to install software revisions.

Since the US5G-M Main Shelf output capacity is limited to 80
frequency outputs and a single time server (redundant or
not), the system has been designed to allow a standard US5G
expansion shelf to be added. The Expansion shelf adds 8
additional slot pairs which can be used with ANY combination
of frequency or time server modules. This should cover any
issues a network operator meets with unanticipated growth in
a particular network serving area.

The US5G-M was conceived to meet ALL contingencies that a
Tier 2 or Tier 3 telco might encounter to provide adequate timing for all their
evolving network synchronization needs.

Key Features

System Software Control
Features

Standard compliant TL-1
Command Line Interface

Each system is shipped
with a full-featured GUI to manage all shelf processes

All
modules are auto-provisioned during installation and initialization

Upon insertion of a
replacement module:
Automated Hardware and Software compatibility checks
Automated Software download of current module software
Auto-provisioning from current provisioning database

Inventory in software:
Input reference source
Output port assignment
Inventory CLEI and Mfg Serial Number in software to help in field
servicing and PCN administration

All software revision
upgrades are managed via the main LAN connection to the
COM module